Viessmann CT3U, Инструкция по эксплуатации, Страница: 10 / 64

10
1. Check with your gas supply utility regarding the
gas type and Wobbe index (Wo).
■ With the natural gas E setting, the boiler can be
operated in the Wobbe index range 12.0 to
16.1 kWh/m
3 (43.2 to 58.0 MJ/m 3 ).
■
With the natural gas LL setting, boilers can be
operated in the Wobbe index range 10.0 to
13.1 kWh/m
3 (36.0 to 47.2 MJ/m 3 ) (not in
a
or
c
).
2. In the delivered condition, the burner is preset for
natural gas E. If necessary, convert the burner to
the other gas type (see page 10) in accordance
with the details provided by the gas supply utility.
3. Record the gas type in the report (on page 54).
Converting to natural gas LL
(Not in
a
and
c
)
0 1. Close the gas shut-off valve.
0 2. Switch OFF the system ON/OFF switch on the
control unit.
0 3. Switch OFF the mains isolator (outside the instal-
lation room) or isolate the mains power and
secure against unintentional reconnection.
0 4. Pull connecting cables from the gas train.
0 5. Undo fitting
A
.
A
B
C
D
G F
E
Fig. 3
0 6. Pull compensation hose
G
from the gas train.
0 7. Release the gas train from flange
E
.
0 8.
Remove restrictor C with rubber cork gasket D .
0 9. Secure the gas train (without restrictor C and
without rubber cork gasket
D
, but with O-ring
B
)
at flange
E
. Replace the factory-fitted screws
M 5
×
16 with the supplied screws M 5
×
12.
10. Secure fitting
A
.
11. Fit compensation hose
G
onto the gas train.
12. Affix supplied label "Set to..."
F
over the existing
label.
13. Start the burner (see page 9).
Danger
Escaping gas leads to a risk of explosion.
Check the fitting for gas tightness.
!
Please note
The use of leak detection spray can result in
faulty operation.
Leak detection spray must not come into contact
with electrical contacts.
Commissioning, inspection, maintenance
Checking the gas type
5783 337 GB